Electro-colouring is the process by which the load is transferred to another tank and immersed in a tin solution. A colour code number is entered into a computer, which calculates the emersion time required to produce the desired colour match.
An alternating current is passed to the item whilst immersed in a tin solution.
Depending on the length of processing, shades of bronze are produced, ranging from:
silver champagne light bronze dark bronze black
black blue red gold violet
Other colours available on request